"The Very Reason That I Live" is a song from the episode "The Great Louse Detective" of the animated television series The Simpsons. It features Sideshow Bob singing to Bart about how plotting to kill him has become such an important part of his life that he can't kill him now. It is a parody of the song "I've Grown Accustomed to Her Face" from the musical My Fair Lady.
It was mainly performed by Bob's voice actor Kelsey Grammer, with a small intervention of Bart's voice actress Nancy Cartwright.
[Dad, I'm really glad you're still alive.]
[Yeah, it's every parent's dream to outlive their children. Good night, son.]
[Looking for this?]
[Now I'm going to take some advice that was given to me by Lenny, and kill you without doing. One thrust and the deed is done.]
[I....I can't do it.]
[Huh? Why not?]
[Well, I guess I've—dear God—grown accustomed to your face!]
I've grown accustomed to his face,
And dreams of gouging out his eyes.
I've grown accustomed to my hate
My plans to lacerate,
To hear him howl.
The very reason that I live
Is plotting how to watch him die.
[Bart! Turn down that original cast recording and go to sleep!]
I know this chubby scalawag
Has made my life a living hell
Surely, if I drank his blood,
I'd be at peace...
You've grown accustomed to my face?
[This isn't a duet.]
I've grown accustomed to your fear,
Accustomed to revenge,
Accustomed to your face.
[We shall meet again, old friend. But now, I must steal away into the night.]
- The song was featured on the album The Simpsons: Testify.